Reliability and validity of a 6-minute yo-yo intermittent endurance test level 2 in subelite part time male soccer players

Neil Gibson*, Chris Easton, Michael Williams, Robert McCunn, Neil V. Gibson

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

54 Downloads (Pure)


The aim of this study was to assess the reliability and relationship to maximal intermittent running performance of the 6-minute Yo-Yo Intermittent Endurance Test Level 2 (YYIET2), among subelite part time soccer players. Twenty male soccer players (15–22 years) completed three 6-minute YYIET2 trials with heart rate (HR), PlayerLoad, and rating of perceived exertion assessed during the protocol and HR and blood lactate assessed during 5 minutes of recovery. Subjects also completed a maximal version of the YYIET2 and the maximal Yo-Yo Intermittent Recovery Test Level 1 (YYIRT1) and 2 (YYIRT2). Heart rate at 4 and 6 minutes, PlayerLoad at 4 minutes, and HR recovery at 2, 3, 4, and 5 minutes during recovery from the 6-minute YYIET2 demonstrated little variance between tests. Correlations between variables measured during and after the 6-minute YYIET2 and distance covered in maximal tests ranged from r = 0.02 to −0.72. The 6-minute YYIET2 provides practitioners with a method of reliably assessing HR responses within subelite part time soccer players, although large correlations with maximal assessments suggest it can be used as a proxy measure for maximal intermittent running performance. Given its ease of administration and low time cost, the 6-minute YYIET2 offers practitioners a useful means of tracking training status and movement efficiency in players longitudinally.
Original languageEnglish
Pages (from-to)1011-1018
Number of pages8
JournalJournal of Strength and Conditioning Research
Issue number4
Early online date18 Aug 2020
Publication statusPublished - 30 Apr 2022


  • field test
  • monitoring
  • testing


Dive into the research topics of 'Reliability and validity of a 6-minute yo-yo intermittent endurance test level 2 in subelite part time male soccer players'. Together they form a unique fingerprint.

Cite this